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Proceedings Paper

Approximate entropy: a new evaluation approach of mental workload under multitask conditions
Author(s): Lei Yao; Xiaoling Li; Wei Wang; Yuanzhe Dong; Ying Jiang
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Paper Abstract

There are numerous instruments and an abundance of complex information in the traditional cockpit display-control system, and pilots require a long time to familiarize themselves with the cockpit interface. This can cause accidents when they cope with emergency events, suggesting that it is necessary to evaluate pilot cognitive workload. In order to establish a simplified method to evaluate cognitive workload under a multitask condition. We designed a series of experiments involving different instrument panels and collected electroencephalograms (EEG) from 10 healthy volunteers. The data were classified and analyzed with an approximate entropy (ApEn) signal processing. ApEn increased with increasing experiment difficulty, suggesting that it can be used to evaluate cognitive workload. Our results demonstrate that ApEn can be used as an evaluation criteria of cognitive workload and has good specificity and sensitivity. Moreover, we determined an empirical formula to assess the cognitive workload interval, which can simplify cognitive workload evaluation under multitask conditions.

Paper Details

Date Published: 16 April 2014
PDF: 6 pages
Proc. SPIE 9159, Sixth International Conference on Digital Image Processing (ICDIP 2014), 91590C (16 April 2014); doi: 10.1117/12.2064063
Show Author Affiliations
Lei Yao, Xi’an Jiaotong Univ. (China)
Xiaoling Li, Xi’an Jiaotong Univ. (China)
Wei Wang, Xi’an Jiaotong Univ. (China)
Yuanzhe Dong, Xi’an Jiaotong Univ. (China)
Ying Jiang, Xi’an Jiaotong Univ. (China)


Published in SPIE Proceedings Vol. 9159:
Sixth International Conference on Digital Image Processing (ICDIP 2014)
Charles M. Falco; Chin-Chen Chang; Xudong Jiang, Editor(s)

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